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Verified answer
Yang Ajawabanya b.30°
soalnya sama" ke titik a dan b
maaf jika salah
yg b aku kurang tau
Bab Sudut
Sudut Keliling = 1/2 sudut pusat
1.
AOB = sudut pusat = 30°
ACB = sudut keliling = 1/2 30° = 15°
2.
AB = sudut pusat = 180°
BCA = sudut keliling = 180/2 = 90°
Essai
Sudut pusat = 130°
Sudut keliling = 130°/2 = 65°